LTC3520EUF-PBF データシートの表示（PDF） - Linear Technology
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LTC3520EUF-PBF Datasheet PDF : 24 Pages
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LTC3520
TYPICAL PERFORMANCE CHARACTERISTICS
Buck Burst Mode Threshold
VOUT = 1.8V
45
L = 4.7μH
40
35
30
25
RBURST = 249k
20
RBURST
= 274k
15
10
RBURST = 301k
5
0
2.2 2.7 3.2 3.7 4.2 4.7 5.2
VIN (V)
3520 G09
Buck Burst Mode Threshold
VOUT = 1.2V
45
L = 3.3μH
40
35
30
25
RBURST = 249k
20
15
RBURST = 301k
10
5
0
2.2 2.7 3.2 3.7 4.2 4.7 5.2
VIN (V)
3520 G09b
Buck RDS(ON)
400
350
PMOS
300
250
200
NMOS
150
100
50
0
–45 –25
–5 15 35 55
TEMPERATURE (°C)
75
3520 G11
Switching Frequency
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–45 –25
–5 15 35 55
TEMPERATURE (°C)
75
3520 G12
Buck Feedback Voltage
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–40 –20
0 20 40 60
TEMPERATURE (°C)
80
3520 G14
No Load Input Current
100
90
80
70
60
50
40
30
20 BUCK AND BUCK-BOOST
10 CONVERTERS ENABLED,
Burst Mode OPERATION
0
2.2 2.7 3.2 3.7 4.2
VIN (V)
4.7 5.2
3520 G15
6
Buck-Boost RDS(ON)
250
PMOS
(SWITCHES A AND D)
200
150
NMOS
(SWITCHES B AND C)
100
50
0
–45 –25
–5 15 35 55
TEMPERATURE (°C)
75
3520 G10
Buck-Boost Feedback Voltage
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–40 –20
0 20 40 60
TEMPERATURE (°C)
80
3520 G13
Buck Output Voltage vs
Load Current
3
TA = 125°C
2
1
TA = 85°C
TA = –40°C, 25°C
0
–1
–2
–3
0
200
400
LOAD CURRENT (mA)
600
3520 G23
3520fa
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